Return for Nuclear Decommissioning Funds and Certain Related Persons: If you owe to file Form 1120-ND and you are in need of more time to prepare your returns, you can file Form 7004 before March 15, 2013.

Return of a Trustee or Self Sealer who owes tax under section 4951: If you are required to file Form 1120-ND taxes under section 4951, you can file an extension before March’15 2013 for extending your filing time.

U.S. Property and Casualty Insurance Company Income Tax Return: If you are liable for U.S Property and casualty Insurance Company Income Tax Return through Form 1120-PC and you couldn’t file on time; file Form 7004 to obtain 6 months extension. If you are filing for a short year, your extension deadline ends by 15th day of third month.

U.S. Income Tax Return for Certain Political Organizations: For filing returns under Form 1120-POL (Income tax return for certain Political Organizations), you must file an extension through Form 7004.

U.S. Income Tax Return for Real Estate Investment Trusts: Application for Extension for Form 1120-REIT (Income Tax Return for Real estate investment trusts) can be done through Form 7004 on or before March’15, 2013.